#include <stdio.h>
#include <wchar.h>
#include <locale.h>
int main() {
    setlocale(LC_ALL, "");
    float ch = 0,words = 0,o = 0;
    wchar_t x;
    while((x = getwchar()) != WEOF){
        switch(x){
        case ' ':
            ch += o;
            if(o>0) words++;
            o = 0;
            break;
        default:
        o++;
        }
    }
 
    printf("\nch per word - %.2f\n",ch/words);
    return 0;
}